Four-probe Thermal Transport Measurements of Few-layer Graphene and Ultrathin Graphite

Download or read book Four-probe Thermal Transport Measurements of Few-layer Graphene and Ultrathin Graphite written by Eric Ou and published by . This book was released on 2020 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique combination of mechanical, electrical, and thermal properties of graphite and its derivatives, such as graphene and carbon nanotubes, make graphitic materials desirable for a number of technological applications as well as a platform for studying various transport phenomena, especially at the nanoscale. Although it has been more than a decade since graphene was first successfully isolated, discrepancies between the results of theoretical and experimental studies have not yet been resolved and the answers to many fundamental questions concerning the details of thermal transport in graphene are still subject to debate. The presence of unknown contact thermal resistance has limited prior two-probe thermal transport measurements of suspended graphene samples. This work utilizes a four-probe thermal measurement technique to measure few-layer graphene and ultrathin graphite samples. This technique has the ability to measure the intrinsic thermal conductance of suspended samples and to isolate the contact thermal resistance between the sample and measurement device. By eliminating error due to contact thermal resistance and developing a clean method for transferring thin-film samples, the true intrinsic thermal properties of graphene can be realized, potentially leading to the observation of unique transport phenomena such as hydrodynamic phonon transport